[llvm-bugs] [Bug 38482] New: AVX512 error in backend: unknown codeview register

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=38482

            Bug ID: 38482
           Summary: AVX512 error in backend: unknown codeview register
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: neumann at imt.uni-luebeck.de
                CC: llvm-bugs at lists.llvm.org

3>CL : fatal error : error in backend: unknown codeview register
3>clang-cl.exe : error : clang frontend command failed with exit code 70 (use
-v to see invocation)
3>clang version 8.0.0 (trunk)
3>Target: x86_64-pc-windows-msvc
3>Thread model: posix
3>InstalledDir: C:\Program Files\LLVM\bin
3>clang-cl.exe: note: diagnostic msg: PLEASE submit a bug report to
https://bugs.llvm.org/ and include the crash backtrace, preprocessed source,
and associated run script.
3>clang-cl.exe: note: diagnostic msg:
3>********************
3>
3>PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
3>Preprocessed source(s) and associated run script(s) are located at:
3>clang-cl.exe: note: diagnostic msg:
C:\Users\neumann.IMT\AppData\Local\Temp\CommandOptions-306f7b.cpp
3>clang-cl.exe: note: diagnostic msg:
C:\Users\neumann.IMT\AppData\Local\Temp\AnisotropyList-f6a129.cpp
3>clang-cl.exe: note: diagnostic msg:
C:\Users\neumann.IMT\AppData\Local\Temp\FieldProperties-6385b1.cpp
3>clang-cl.exe: note: diagnostic msg:
C:\Users\neumann.IMT\AppData\Local\Temp\HydrodynamicProperties-e413a3.cpp
3>clang-cl.exe: note: diagnostic msg:
C:\Users\neumann.IMT\AppData\Local\Temp\MagneticProperties-77f9d1.cpp
3>clang-cl.exe: note: diagnostic msg:
C:\Users\neumann.IMT\AppData\Local\Temp\ParticleProvider-7d81db.cpp
3>clang-cl.exe: note: diagnostic msg:
C:\Users\neumann.IMT\AppData\Local\Temp\ParticleSimulationSettings-d4fda6.cpp
3>clang-cl.exe: note: diagnostic msg:
C:\Users\neumann.IMT\AppData\Local\Temp\ProblemSettings-ab689b.cpp
3>clang-cl.exe: note: diagnostic msg:
C:\Users\neumann.IMT\AppData\Local\Temp\ResultSettings-aea222.cpp
3>clang-cl.exe: note: diagnostic msg:
C:\Users\neumann.IMT\AppData\Local\Temp\SimulationSettings-e49730.cpp
3>clang-cl.exe: note: diagnostic msg:
C:\Users\neumann.IMT\AppData\Local\Temp\SolverSettings-7b60f0.cpp
3>clang-cl.exe: note: diagnostic msg:
C:\Users\neumann.IMT\AppData\Local\Temp\SimulationApplication-6c59ad.cpp
3>clang-cl.exe: note: diagnostic msg:
C:\Users\neumann.IMT\AppData\Local\Temp\CommandOptions-306f7b.sh
3>clang-cl.exe: note: diagnostic msg:
3>
3>********************

Might be related to https://bugs.llvm.org/show_bug.cgi?id=35306 

Compiles fine with AVX and AVX2 but using /arch:AVX512 crashes clang in
release. In debug without optimizations (/Od) it compiles fine. 
(Also crashes with clang 6.0)

Could not attach files due to size limitations. Compiling
SimulationApplication-6c59ad.cpp is the problem.

Compiling with "emit-llvm" works -> code generator crash?

Any advise how to solve the problem or further help investigating it?

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